Elpida Memory, Inc.
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EDE2108ABSE

Specifications

  • Density: 2G bits
  • Organization
    -32M words x 8 bits x 8 banks
  • Package: 68-ball FBGA
    -Lead-free (RoHS compliant)
  • Power supply: VDD, VDDQ = 1.8V +/- 0.1V
  • Data rate: 800Mbps/667Mbps/533Mbps (max.)
  • 1KB page size
    -Row address: A0 to A14
    -Column address: A0 to A9
  • Eight internal banks for concurrent operation
  • Interface: SSTL_18
  • Burst lengths (BL): 4, 8
  • Burst type (BT):
    -Sequential (4, 8)
    -Interleave (4, 8)
  • /CAS Latency (CL): 3, 4, 5, 6
  • Precharge: auto precharge option for each burst access
  • Driver strength: normal/weak
  • Refresh: auto-refresh, self-refresh
  • Refresh cycles: 8192 cycles/64ms
    -Average refresh period
     7.8 µs at 0'C <= TC <= +85'C
     3.9 µs at +85'C < TC <= +95'C
  • Operating case temperature range
    -TC = 0'C to +95'C

Features

  • Double-data-rate architecture; two data transfers per clock cycle
  • The high-speed data transfer is realized by the 4 bits prefetch pipelined architecture
  • Bi-directional differential data strobe (DQS and /DQS) is transmitted/received with data for capturing data at the receiver
  • DQS is edge-aligned with data for READs; centeraligned with data for WRITEs
  • Differential clock inputs (CK and /CK)
  • DLL aligns DQ and DQS transitions with CK transitions
  • Commands entered on each positive CK edge; data and data mask referenced to both edges of DQS
  • Data mask (DM) for write data
  • Posted /CAS by programmable additive latency for better command and data bus efficiency
  • Off-Chip-Driver Impedance Adjustment and On-Die-Termination for better signal quality
  • Programmable RDQS, /RDQS output for making x 8 organization compatible to x 4 organization
  • /DQS, (/RDQS) can be disabled for single-ended Data Strobe operation

Ordering Information

Part Number Grade Package Datasheet IBIS Verilog
EDE2108ABSE-8G-E DDR2-800(6-6-6) 68-FBGA E1196E20 ede2108abse_101 ede2108ab_8g_0618_vp
EDE2108ABSE-6E-E DDR2-667(5-5-5) 68-FBGA E1196E20 ede2108abse_101 ede2108ab_6e_0618_vp
EDE2108ABSE-5C-E DDR2-533(4-4-4) 68-FBGA E1196E20 ede2108abse_101 ede2108ab_5c_0618_vp

User's Manual, Technical Note